Bag-machine.



C. B. SANDERS.

BAG MACHINE. APPLICATION FILED IuLY 28.19I'6.

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c. B. SANDERS.

BAG NIACHINEL l APPLICATION FILED JULY 20.1916.

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ARLES B. SANDERS, 0F MONTCLAIR, NEW JRSEY, ASSIGNOR 'DO-THE UNION BAG cPAPER COMPANY, OF NEW YORK, N. Y., A CO'RPORATION OF NEW JERSEY.

IBAGJVICHINE.

To all whom t may concern:

Be it known that 1, CHARLES B. SANDERS, a citizen of the United States,residing at Montclair, New Jersey, have invented cerf tain new anduseful -llmprovements in Bag- Machines, of which the following is aclear, full, and exact description.

This invention relates to bag machines and improvements upon suchmachines as those shown and described in the Stilwell Patent #417,346,dated December 17, 1889. Qne object of the present invention is toprovide mechanism for making paper bags of the type which have bellowssides and a'square bottom connected by folds with said sides in such away that the bag may be opened'y up like a box, with a side seam, that-1s to say, a seam at one edge of the flat face ofthe bag.

Another object of the invention is t0 provide means for producing slitsat intervals in the traveling web of paper folded over the formerplates, in such a way that portions of the web are protected or guardedagainst the slitting action. l.

Other objects are to -provide improved draw rolls specially located inmachines.- of lthe class mentioned for pasting down and forming thelongitudinal seam of the bag, and to improve bag machinery of the saidclass generally so as to render it more efficient and satisfactory. i

These being among the objects of the present invention, the sameconsists of certain features of .construction and combinations of artsto be hereinafter described and then claimed with reference to theaccompanying drawings illustrating a desirable embodiment of theinvention, and in which--` Figure 1 is a plan of a portion of themechanism for forming a bellows folded tube and severing it into bagblanks;

Fig. 2 is a side elevation of the same mechanism;

Fig. 3 is a side elevation o'f the ingoing end of the machine, showingthe paste-applying means and other adjacent parts;

F ig. 4 is a plan of the parts showny in Fig. 8;

Fig. 5 is a section on the line 55 Fig. 2, the parts being enlarged, toshow the means for guiding one portion of the folded tube againstcutting when another portion is bein slit' Fig. is a detail plan view ofthe guard;

4 Specification of Letters Patent. Application led July 28, 1916. SerialNo. 111,758.

ratented nee. ii, reir..

Fig. 7 is an enlarged detail view of the improved draw rolls;

Fig. 8 is a plan view of a bag blank folded out to show just where theslits are made in the bag bottoni; and

Fig. 9 is a perspective viewl showing the ,oep't for the location of thepaste-holder Vor receptacle, at the other end of the paper roll 11, allof said parts may be constructed and arranged as in aforesaid patent.Clips 20, 21are also provided to form guides for the -folded web ofpaper, substantially as in said patent, except that the position of thesaid clips is reversed. The function of the said parts is substantiallythe same as in said patent, but the web of paper is conducted to theformer plates in such a way that the seam to be formed does not runalong the middle of the upper 4plate but along one side thereof, or atthat side which corresponds with the other end of the aper roll fromthat at which the paste-hol er is located.

Slitter knives 22, 28 are mounted on rotary shafts 24, 25 driven as bygears 26., 27, for the purpose of slitting the folded web of `paperlongitudinally. Located between the upper former plate 15 and one of theslitters 22, as shown in Fig. 5, is a guard device 28. As shown in said-figure and in Fig. 6, said guard is provided with a base portion or`flange 29 and a table or rest portion 30 rest portion 30 extendstransversely of the I former plate 15, or in a direction away from themiddle of said plate. A slot 33 extends transversely of the end of thetable or rest said b lank folded over and just before the shaft may b'edriven from the lower shaft.

The lower draw roll is'fiXed upon the shaft 36, while the draw roll ispositively.

driven in the usual way for cooperating with the roll 34 to draw the'folded blank 'or tube along the lower former plate 16. Draw roll 35 maybe composed of two sec'- tions secured as by set screws 40 to the shaft37, the ends of said screws entering a channel in thesaid shaft s'o thatsaid sections may be adjusted. Thel outer end of the draw roll 3.5 isreduced or recessed so as to receive a preferably hard steel ringorcollar 41, which is ldriven onto said reduced portion so as to be firmlyheld thereon'. The position of the ring or collar 41 is suchthat it isinalinement with the slitter 22 which coperates with the guard 30. That isto v y say, inasmuch as the bags ,to be made on thismachine are Inadewith a'seam located at one edge, the said ring or collar 41 ispositioned so as' to press the pasted edge of the folded tube onto theunpasted edge, said edges being pressed together by the said ring andthe lowerdraw roll so as to produce the edge seam'. In order to properlyoperate in producing the' edge seam, the ring or collar 41 is providedwith one or more annular presser portions which adjoin an annular grooveor grooves. Two grooves 42,43 are shown, an annular presser portion 44being located to thel side of one groove, and an annular presser portion45 being located between said grooves. The function of theannularpresser portions is topress upon the pasted edge of the tube j so. as topress it' against the unpasted edge,

whichjresults in' squeezing the paste laterally, means for the lateralmovement or 3:50

annular grooves 42,43. The joint of the escape of the paste beingprovided by the i seam will be pasted alongtwo lines represented by thegrooves 42, 43, as much of the paste is squeezed out from under thepresser portions 44, 45. Y

A bag blank is shown in Figs. 8 and 9.

' A folded'web 46 is provided with intermediate face 47 and an oppositeface 48, said faces "being .comparatively wide and intended to form thefront and back of the bag ultimately produced. A bellows fold is shownbetween the faces 47, 48, and anl j other bellows fold between the face47 and the edge 49, which edge during the passage of the folded webthrough the machine is folded over onto the edge of the upper formerplate. The face 48 of the blank receives the paste from the paste-holderwhich is located at one end of the paper roll, and said face is foldedover upon the upper former plate in a manner similar to that in theaforesaid patent. The paste, however, is applied to the edge 50 of saidface 48 instead of to the other edge of the web, as is donein saidpatent. Before the pasted edge is pressed onto the unpasted edge 49 bythe action of the draw rolls, the slitters 22, 23 slit the tube orfolded-over web atV or blank passes the slitters, it goes to the drawrolls where the edge 50 is pasted down upon the edge 49, whereby an edgeseam for the bag blank is provided. The so-formed bag passes to theserrated edge of the lower former plate, and the bag blanks are theresevered 1n the well known manner, the severance taking place at theslits 51, 52 which have been formedin the folded-over tube or blank.From this point the bag blank passes along to the bottom-formingmechanism, which forms no part of this invem tion, as suitable mechanismis fully shown in the aforesaid patent.

It is] obvious that the invention is susceptible of modification, asparts may be 4 omitted, parts added and parts substituted withoutdeparting from the spirit and scope -of the invention as claimed.

What I claim as new is:-

1. In a bag machine, the combination of a frame, former plate supportedthereon, a paste-holder supported in advance of said plates toward oneend of the roll of paper, means for conducting a web over said platesafter applying paste from said holder to the edge portion of said webwhich is adjacent said holder and for forming the tube over said plates,draw rolls having spaced presser portions adjacent the edge of one ofsaid plates but just'inside the line offsaid plate-edge, and in advanceof the rear end of said plate, for pasting said edge portion upon theother edge portion of said web, whereby a tube with a side seam isformed.

2. In a bag machine, the combination of former plates over which a webmay be ,longitudinally folded so that its edge portions may overlap,means for drawing said folded web along over said plates, a slitter forlongitudinally slitting the portion of said web which is more remotefrom one of apagada said plates than the other portions of said Web, anda guard over and under which the said edge portions respectively travel,for holding raised one edgeportion and pro teoting the other edgeportion of said web which is nearer to said plate against the action ofsaid slitter, said slitter having a path of movement out of the plane ofsaid edge portion nearer said plate.

3. ln a bag machine, the combination of former plates over which a webmay be longitudinally folded, means for drawing said Web along saidplates, a slitter for longitudinally slitting an edge portion of lsaidWeb at intervals, and a guard fixed to one of said plates and raisedabove it 'at one end for protecting the other edge portion of said Webagainst said slitter, the said edge portions being caused to travel atopposite sides of said end of said ard.

Signed at Hudson Falls, N. Y., this 25th day of July, 1916.

' CHARLES B. SANDERS., Witnesses: C. B. PALME,

Bnssiue J. WRIGHT.

